Raoitl harilaos



(No Model.)

B. HARILAOSJ STEREOSGOPE FOR ADVERTISING PURPOSES. No. 558,684. Patented Apr. 21, 1896.

ANDREW EGRAHIM. FHOTU-UTHQ WASHINGYON. D C

llNrTE STATES PATENT RAOUL IIARILAOS, OF PARIS, FRANCE.

STEREOSCO PE FOR ADVERTISING PU RPOSES.

SPECIFICATION forming part of Letters Patent No. 558,684, dated April 21, 18 96.

Application filed october'l'i, 1895. Serial No. 565,956. (N0 model.) Patented in France October 4,1894,N0. 241,846, and in England September 17, 1895,1To. 17,306-

To all whom it may concern:

Be it known that I, RAOUL HARILAOS, a citizen of the French Republic, residing at Paris, in the Department of the Seine, France, have invented certain new and useful Improvements in Stereoscopes for Advertising Purposes, of which the following is a specification.

This inventiomwhich has been patented in France October 4, 1894:, No. 241,846, and in Great Britain September 17, 1895, No. 17,306, relates to an improved construction of stereoscopes for advertising purposes and for public use in such places of public resort as restaurants, hotels, cabs, railway-carriages, and the like. In these improved stercoscopes there is employed a series of views successively mounted upon endless bands or films arranged around two or more rollers or upon continuous bands or films, each of which is wound alternately upon one or the other of two rollers.

In the case of the endless band a single handle suffices to operate the apparatus. In the other case two such handles may be employed; but it having been found in practice that the use of two handles is inconvenient there has been designed and is illustrated in the accompanying drawings, to which reference is hereinafter made, a stereoscope with a continuous band operated by a single handle.

In the drawings, Figure 1 is a view of a vertical longitudinal section. Fig. 2 represents a transverse section along the line 1 2, Fig. 1. Fig. 3 is a similar sectionalong the line 4.

Similar letters of reference are employed to denote similar parts in each of the figures.

R and R indicate the two rollers which carry the endless band or film upon which the series of views is mounted successively; M, the operating-handle; B, a barrel-spring; P, a toothed pinion engaging with a toothed wheel E; 1" and r guiding-rollers, and F a spring acting as a brake.

In the particular construction illustrated the different successive views are produced or mounted upon the endless band or film p, which is preferred to be transparent. This film is carried by the two rollers R and R one of which, R, is capable of being turned by means of the external handle M, so as to wind and unwind the continuous band or film. Tension in the film is obtained by means of the barrel-spring B, acting through the intermediary of the toothed wheel and pinion P E, of which the pinion is fixed upon the axis of the roller R and the Wheel upon that of the barrel-spring. The barrel-spring is made sufficiently strong to pull up any slackness which may arise in the film between the rollers.

To prevent any movementof the film or rollers when the apparatus is not being actuated, a brake may be provided. This may consist of the spring F, which presses forcibly against a cylindrical part of or upon the roller R, thus developing sufficient friction to more than balance the maximum tension of the spring B. This prevents the action of the spring B when the handle of the roller R is not controlled by hand.

The barrel-spring as well as the brake may either or both be substituted by other devices by means of which the same object may be obtained.

In using the stereoscope if the handle be turned in one direction the film or continuous band will be wound on the upper 1'oller,while if it be turned in the opposite direction the barrel-spring will act to wind it upon the lower roller.

Having now particularly described my said invention, Iv declare that what I claim is 1. A stereoscope for advertising and for public use, comprising two rollers, a band wound upon said rollers, and carrying a se ries of views, a spring drum geared to one of said rollers, and tending to wind the band in one direction, means for turning the other roller by hand, and a friction-brake pressing against said roller with sufficient force to more than balance the tension of the windingspring and hold the rollers in any position to which they may be turned, substantially as described.

2. A stereoscope for advertising and the like, comprising the rollers R R the band 13 wound thereon, the guide-rollers 7" r the handle M on the roller R, the barrel-spring B, the toothed Wheel E driven bysaid spring, enee of two witnesses, this 24th day of Septhe pinion P on the roller R meshing With telnber, 1895. the Wheel E, and the flat spring F pressing against the roller R, substantially as de- RAOUL HAR'ILAOS' 5 scribed. v

In testimony that I claim the foregoing as myinvention I have signed m'ynmne, in pres- WVitnesses HENRY DANZER, CLYDE SHROPSHIRE. 

